For letter-size hanging file folders (sold separately). Sliding file rails adjust to hold legal-size file folders (sold separately). Bottom storage shelf removes easily to add Vertiflex® Companion File (VRTVF52006 sold separately). Durable steel and wire construction. Four twin-wheel casters, two locking. Open-Top Design. Material(s): Metal Wire; Steel; Overall Material Type: Metal; Color(s): Matte Gray; Color Family: Gray.